EP2553013B1 - Gegossene pellets zum pflanzen von samen - Google Patents

Gegossene pellets zum pflanzen von samen Download PDF

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Publication number
EP2553013B1
EP2553013B1 EP11763412.1A EP11763412A EP2553013B1 EP 2553013 B1 EP2553013 B1 EP 2553013B1 EP 11763412 A EP11763412 A EP 11763412A EP 2553013 B1 EP2553013 B1 EP 2553013B1
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Prior art keywords
composition
seeds
pellet
cast
mold
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French (fr)
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EP2553013A4 (de
EP2553013A1 (de
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Robert Conrad
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Ball Horticultural Co
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Ball Horticultural Co
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C1/00—Apparatus, or methods of use thereof, for testing or treating seed, roots, or the like, prior to sowing or planting
    • A01C1/06—Coating or dressing seed

Definitions

  • sowing It has long been common practice to "pellet" or "coat” seeds of various types to facilitate the sowing process. Typically, growers want to place a single seed in a specific location, hence they may use sowing equipment to select a single coated or pelleted seed for placement. Thus, most coated or pelleted seeds contains a single seed. Sowing can be done directly in a field, as with agronomic and some vegetable crops, or into containers in greenhouses, as in flower and some vegetable crops.
  • plugs In some circumstances, it is desired to have more than a single seedling growing in close proximity to others. Examples include some ornamental species being grown as young plants for subsequent transplanting to larger containers ("plugs"). In these species, plugs reach a transplantable stage earlier, and result in a better finished product, if there are multiple seedlings growing in the same individual plug cell.
  • One way to achieve multiple seedlings growing in close proximity to others is to sow multiple seeds in close proximity.
  • this requires picking up multiple seeds and placing them in the same plug cell, either at one time (via multiple orifices in the sowing machine) or by passing the plug tray through the sowing line multiple times.
  • Another way to achieve multiple seedlings growing in close proximity to others is to include multiple seeds in a single pellet or coated seed product.
  • This approach is advantageous in that the same sowing equipment can be used as for sowing single seeds, and the plug tray need only pass through the sowing line one time. Indeed, over time, multiseed pellets of certain species have become the predominant form in the market.
  • multiseed pellets have been used. For example, multiseed pellets containing two seeds from a seed lot with a 60% germination rate will result in germination of one or two seedlings in 84% of plug cells. Thus, more recently, multiseed pellets have been used to provide a higher germinating product to the market compared to single seed pellets.
  • An alternative to transplanting multiple plugs of a single plant into a mixed container would be to directly sow a multiseed pellet, or transplant a plug produced from a multiseed pellet into the mixed container.
  • Multiseed pellets containing seeds of different colors of the same species have been on the market, but the color composition of each individual multiseed pellet, and hence each plug grown from a multiseed pellet, cannot be controlled.
  • the aggregation step in the multiseed pellet production process described above is random as to which seeds aggregate together. This process cannot result in predictable and reproducible color combinations within a single multiseed pellet.
  • US-A-5 623 781 discloses pills or pellets containing seeds and inert carrier material, characterized in that the inert carrier material forms the core of the pills or pellets, while the seeds are distributed in a multitude around the core, adhering to that core in an adhesive layer.
  • An illustrative embodiment of the present invention comprises a composition comprising a mixture of one or more plant seeds and a setable, flowable casting substance wherein the mixture is configured as a cast pellet.
  • the casting substance comprises a water-soluble thermoplastic.
  • the thermoplastic can comprise polyethylene glycol, such as polyethylene glycol having a molecular weight of about 1,500 to about 20,000.
  • the thermoplastic has a glass transition temperature of 35.0°C or higher, and may also have a melting temperature of 65.6°C or lower.
  • the casting substance comprises plaster, polyacrylamide or a derivative thereof, polyacrylic acid, a melt processable starch, a hard fat, a wax, polyvinyl alcohol, glycerides, or partial glycerides, or mixtures thereof.
  • the pellet comprises at least two plant seeds.
  • the at least two plant seeds can comprise seeds of at least two different species, or can comprise seeds of one species.
  • the at least two plant seeds can comprise at least two selected flower colors.
  • the one or more plant seeds can be untreated, coated, pelleted, treated, primed, or mixtures thereof.
  • the mixture can further comprise a filler.
  • the filler can be inert, such as sand or clay, or the filler can possess functionality, such as the ability to modify the water solubility, permeability, color, or rheological properties of the cast pellet.
  • the mixture can comprise one or more plant growth regulators, insecticides, fungicides, bactericides, fertilizers, microorganisms, or mixtures thereof; or a dummy pellet or smart pill.
  • the composition can further comprise an overcoating disposed on the cast pellet.
  • Another illustrative embodiment of the present invention comprises a method of making a cast pellet, the method comprising:
  • thermoplastics also known as thermosoftening plastics
  • thermosoftening plastics are polymers that liquify when heated and freeze into glassy states when cooled. Thermoplastics can be remelted and remolded by raising and lowering the temperature.
  • a thermoplastic is elastic and flexible above its glass transition temperature ( T g ). Below its melting temperature ( T m ), which is higher than the glass transition temperature, a thermoplastic generally has crystalline regions alternating with amorphous regions in which the polymer chains approximate random coils. Above the melting temperature all crystalline structure disappears and the chains become randomly interdispersed. As the temperature increases above the melting temperature, viscosity decreases without any distinct phase change.
  • T g glass transition temperature
  • T m melting temperature
  • T m melting temperature
  • FIG. 1 shows an illustrative mold for making cast pellets according to the present invention.
  • the mold 100 comprises multiple cavities 102 formed therein.
  • the cavities 102 can be formed in any shape, but shapes that result in cast pellets that can be sown with conventional sowing equipment are advantageous.
  • the mold for making cast pellets can be made of any suitable material.
  • an illustrative material for making molds is noted MOLD PUTTY (Amazing Crafting Products/Alumilite Corporation, Kalamazoo, Michigan), a platinum-based silicon mold rubber. This material is flexible, which facilitates removal of the solidified castings.
  • the layout or configuration of the cavities or cells can vary widely. It is desirable for the layout of cavities to match the layout of the sowing device. For example, a typical sowing machine for plug trays with 512 cells in a 11 x 22 inch (28.2 x 56.3 cm) layout can be used without modification if the mold is configured with 512 cavities in the same footprint. The volume of the cavity should be large enough to accommodate all of the seeds selected in each pellet, yet small enough for the pellet to be sown using conventional sowing machines.
  • the shape of the cavities in the mold can vary.
  • a cube or cuboid shape is easily done, but presents all flat surfaces without any rounded surfaces.
  • cavities were shaped like half a gel capsule, split along the long axis. This resulted in cast pellets with one rounded surface along a portion of it's long axis, rounded surfaces on both ends, and a flat surface along the remaining portion of it's long axis.
  • a hemisphere shape is also easily produced.
  • two-part molds can be used by filling the bottom mold portion with seeds, placing the top mold portion over the bottom mold portion, and injecting the molten material into the void.
  • squared or flat surfaces can be rounded by tumbling them in a rotating pan. Increasing temperature above room temperature would make the castings softer and facilitate rounding.
  • One or more seeds and a molten composition comprising a water-soluble thermoplastic are placed in the cavities 102 of the mold 100.
  • the seeds and molten composition can be mixed in the cavities 102, or can be mixed prior to placement in the cavities 102.
  • the molten composition is then cooled such that the thermoplastic solidifies to result in the cast pellets.
  • FIG. 2 shows illustrative cast pellets 104 containing seeds 106.
  • the water-soluble thermoplastic would ordinarily be a solid at temperatures likely to be encountered during storage, packaging, shipping, and sowing (approximately less than 95°F or 35.0°C).
  • the glass transition temperature for a suitable thermoplastic is about 95°F (35.0°C) or higher.
  • the thermoplastic would ordinarily be liquid at a temperature that will not injure seeds (approximately less than 150°F or 65.6°C).
  • the melting temperature for a suitable thermoplastic is typically about 150°F (65.6°C) or lower.
  • the water-soluble thermoplastic should not have a high density or viscosity when molten so that seeds float on the molten thermoplastic. Rather, the water-soluble thermoplastic should be sufficiently free-flowing while molten to occupy the voids around seeds in the mold cavity. Further, the water soluble thermoplastic should be sufficiently water soluble, or water permeable, to allow seeds to imbibe water and to germinate.
  • thermoplastics In addition to thermoplastics, other casting substances can be utilized to make the cast pellets. Suitable materials should be sufficiently free-flowing, so that voids around the seeds in the cavity are filled, should become rigid via mechanisms such as changes in temperature or a chemical reaction, and should dissolve, shatter, or disaggregate after sowing to allow seeds to imbibe water and to germinate.
  • Additional flowable casting substances include but are not limited to plaster, polyacrylamide and its derivatives, melt processable starches, hard fats, waxes, polyvinyl alcohols, glycerides, and partial glycerides. Combinations of flowable casting substances can be utilized. Combinations include but are not limited to waxes with glycerides, and polyacrylamide with polyvinyl alcohols.
  • Thermoplastic materials undergo a phase change due to temperature, being flowable in a liquid phase at elevated temperatures and solid at a lower temperature.
  • Water soluble thermoplastics dissolve after sowing, leaving seeds exposed to germinate.
  • plaster can be used, as it is flowable in a liquid phase, solidifies due to a chemical reaction, and dissolves after sowing.
  • polyacrylamide and its derivatives including polyacrylic acid are flowable at high pH, become rigid at a low pH. Raising the pH after sowing would allow the polyacrylic acid to transform to a very low viscosity, allowing the seeds to germinate.
  • Melt processable starches as described in U.S. Application No. 12/266,057 , also have suitable melt viscosity to function as casting substances.
  • Seeds can be placed into the mold cavities using any of a number of approaches including manually, with a vacuum plate, or with any commercially available seeding device. Seeds being placed can be raw seeds, coated, pelleted, treated, primed, or any form normally sown into media or soil.
  • inert fillers can be included in the cast pellets to reduce cost, change density, change color, contribute to rheological changes, or to influence water permeability or absorption.
  • inert fillers include sand, clays, and the like.
  • Cast pellets according the present invention can be overcoated with materials to improve flowability through sowing equipment, change colors, and the like.
  • the processes for overcoating cast pellets may be the same or similar to those use for overcoating seeds, as is well known in the art.
  • any material currently used to treat seeds can be envisioned as being included in the cast pellets according to the present invention.
  • Active ingredients can be introduced to the cast pellets directly by suspending them in the molten water-soluble thermoplastic, or by delivering a capsule, granule, smart pill (dummy pellet), or the like to the cavity in the same manner as a seed.
  • the cast pellet When using a cast pellet comprising a water-soluble thermoplastic, the cast pellet dissolves upon watering after sowing, leaving the one or more seeds and anything included in the cavity in proximity to the one or more seeds.
  • any materials that could be beneficial by being in close proximity to seeds are candidates for inclusion into the cast pellet.
  • Illustrative examples include insecticides, fungicides, bactericides, plant growth regulators, fertilizers, and microorganisms.
  • a person of ordinary skill in the art can precisely and reproducibly control the composition of each cast pellet.
  • the number of seeds of a single variety can be adjusted to result in a specified range of number of seedlings based on the germination rate of the starting seed lot.
  • the desired color mix of a single species within each individual cast pellet can be achieved.
  • the desired mix of different species within each individual cast pellet can also be achieved.
  • the result is a cast pellet that can be handled, stored, packaged, shipped, sown, and germinated like regular seed.
  • the cast pellet can also serve as a carrier for biologically active materials, such as fungicides, insecticides, plant growth regulators, nutrients, and the like.
  • each cavity or cell the mold should have a sufficient volume to contain the desired mixture of thermoplastic, seeds, and other optional ingredients.
  • the volume of each cavity or cell is independent of the layout, configuration, and/or dimensions of the mold.
  • the layout, configuration, and/or dimensions of the mold can be varied to suit the method of placement of the seeds in the mold, as described more fully below.
  • Placement of seeds in the mold can be by any known method, such as by hand or by the use of known seed sowing devices, such as vacuum plate, drum seeder, needle seeder, belt seeder, cone seeder, and the like.
  • the seeds placed in each cavity or cell of the mold can be raw (untreated) seeds, coated seeds, pelleted seeds, primed seeds, treated seeds, and the like. This process of placing seeds in the cavities of the mold can be repeated with seeds of other species, colors, and so forth, until a selected mixture is obtained.
  • the water-soluble thermoplastic in a liquid state can be added to the mold to fill each cavity or cell so that the void space among the seeds is filled. After filling, the liquid thermoplastic is allowed to cool and solidify. The resulting solidified cast pellets of known composition can then be removed from the mold.
  • the 108 castings (seed plus PEG 2000) and production multipelleted control were sown in a plug tray to evaluate germination. Seeds were sown at either 25°C or 20°C, depending on the seed crop sown.
  • the plug trays were run through a watering tunnel and then put into a Stage 1 mist chamber. Upon radical emergence, the plugs were placed in a Stage 2 chamber. The amount of time in Stage 1 and Stage 2 was dependent on the selected crop. Germination results are presented in Table 1.
  • a single seed was placed in every mold cavity of a mold containing 108 cavities of dimension of 0.25 inch (6.4 mm) in length by 0.125 inch (3.2 mm) in width and 0.125 inch (3.2 mm) in depth.
  • PEG 2000 was heated to 111°F until the PEG 2000 completely melted, then 65 ⁇ l of molten PEG 2000 was pipetted into the cavities containing the seeds. Once the entire mold was filled it was set aside to cool. The castings were then removed from the mold.
  • the 108 castings (seed plus PEG 2000), along with a raw control, were sown in a plug tray to evaluate germination. Seeds were sown at either 25°C or 20°C, depending on the seed crop sown.
  • the plug trays were run through a watering tunnel and then put into a Stage 1 mist chamber. Upon radical emergence, the plugs were placed in a Stage 2 chamber. The amount of time in Stage 1 and Stage 2 was dependent on crop. Germination results are presented in Table 2.
  • a single seed was placed in every mold cavity of a mold containing 108 cavities of dimension of 0.25 inch (6.4 mm) in length by 0.125 inch (3.2 mm) in width and 0.125 inch (3.2 mm) in depth.
  • PEG 2000, PEG 4000, PEG 8000, and Gelucire® 43 were heated until completely melted, then 65 ⁇ l of molten water soluble thermoplastic was pipetted into the cavities containing the seeds. All of the PEGs melted at 145°C or below, and the Gelucire® 43 at about 104°C. Once the entire mold was filled it was set aside to cool. The castings were then removed from the mold.
  • the 108 castings (seed plus water-soluble thermoplastic), along with a raw control, were sown in a plug tray to evaluate germination. Seeds were sown at either 25°C or 20°C, depending on the seed crop sown.
  • the plug trays were run through a watering tunnel and then put into a Stage 1 mist chamber. Upon radical emergence, the plugs were placed in a Stage 2 chamber. The amount of time in Stage 1 and Stage 2 was dependent upon crop. Germination results are presented in Table 3.
  • a single seed was placed in every mold cavity of a mold containing 108 cavities of dimension of 0.25 inch (6.4 mm) in length by 0.125 inch (3.2 mm) in width and 0.125 inch (3.2 mm) in depth.
  • PEG 2000 was heated to 111°F until the PEG 2000 completely melted.
  • Fillers were added to the melted PEG, and the resulting mixture was stirred on a hot plate until completely mixed.
  • Two kinds of fillers were added: clay and sand.
  • One casting mixture was made up of 10% Celite (clay), and the second casting mixture was made of 5% Sylox (sand).
  • a third casting was made without any fillers. After preparation of the mixtures, 65 ⁇ l was pipetted into the cavity that contained the seeds. Once the selected number of molds were filled it, they were set aside to cool. The castings were then removed from the mold.
  • the 108 castings seed plus PEG 2000, with and without fillers
  • a raw control were sown in a 108-plug flat to evaluate germination. Seeds were sown at either 25°C or 20°C, depending on the seed crop sown.
  • the plug trays were run through a watering tunnel and then put into a Stage 1 mist chamber. Upon radical emergence, the plugs were placed in a Stage 2 chamber. The amount of time in Stage 1 and Stage 2 was dependent on the crop.
  • fillers or extenders can be added to change the properties of the cast multiseed pellets.
  • the seeds need not be raw (untreated) seeds. Coated or pelleted single seeds can also be sown in the cavities or cells.
  • seed treatment it is common to use seed treatment as a delivery vehicle for various biologically active materials.
  • seeds are commonly treated with fungicides to prevent fungal diseases and with insecticides to protect against insect damage.
  • seeds can be treated with plant growth regulators as an alternative to drench or spray application to prevent seedling stretching.
  • a single seed was placed in every mold cavity of a mold containing 108 cavities of dimensions 0.25 inch (6.4 mm) in length by 0.125 inch (3.2 mm) in width and 0.125 inch (3.2 mm) in depth.
  • the following growth regulator concentrations were applied to seed via the casting method: 2ppm, 4ppm, and 8ppm.
  • PEG 4000 100 g was weighed out and put into a beaker. This was done four times. Each beaker with the PEG 4000 was heated to 111°F until the PEG 4000 completely melted.
  • the growth regulator concentrations were made by dissolving a given weight of the plant grown retardant ancymidol ( ⁇ -cyclopropyl- ⁇ -( p- methoxyphenyl)-5-pyrimidinemethanol; A-REST) powder into 1 ml of acetone, as follows: 6.4 mg A-REST into 1 ml of acetone for 2 ppm; 12.8 mg A-REST into 1 ml of acetone for 4 ppm; and 25.6 mg A-REST into 1 ml acetone for 8 ppm.
  • A-REST retardant ancymidol
  • the specified concentrations of A-REST were added to the beakers with the melted PEG and mixed on the heated stir plate until well blended; 65 ⁇ l was pipetted into the cavities that contained the seeds. Once the entire mold was filled it was set aside to cool. This process was repeated for each of the A-REST concentrations and the cast control that did not contain any A-REST. The castings were then removed from the mold.
  • the 108 castings (seed plus PEG 4000) containing the A-REST concentrations, along with a cast only (no added A-REST) and a raw control, were sown in a plug tray to evaluate germination. Seeds were sown at 25°C. The plug trays were run through a watering tunnel and then put into a Stage 1 mist chamber. Upon radical emergence, the plugs were placed in a Stage 2 chamber. The amount of time in Stage 1 and Stage 2 was dependent on the crop.
  • BCG Ball Control Growth
  • PEG 2000 was heated to 111°F until the PEG 2000 completely melted, then 65 ⁇ l was pipetted into the cavities that contained the seeds. Once the selected number of mold cavities was filled, the mold was set aside to cool. The castings were then removed from the mold.
  • two or three treatment methods can be used in combination as a means of applying an active ingredient.
  • Illustrative treatments include insecticides, fungicides, bactericides plant growth regulators, fertilizers, and microorganisms. Release of active ingredients can be immediate or delayed. Representative treatment options for one active ingredient are presented in Table 7. Table 7 Treatment Method % of Active Ingredient Application to seed before casting 33 50 50 Active ingredient within casting substance 33 50 50 Application to seeds included in cast pellet with non-treated seeds 34 50 50 Total 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100
  • seeds can be treated with a combination of fungicides having different modes of action.
  • seeds can be treated with a combination of an insecticide and a fungicide, or a fungicide and a growth regulator.
  • Treatment methods including the application of an active ingredient to seeds before casting, application of the active ingredient within the casting substance, and application of an active ingredient to seeds included in cast pellet with non-treated seed can be used to provide multiple combinations of treatment options.
  • Illustrative treatments include combinations of insecticides, fungicides, bactericides plant growth regulators, fertilizers, and microorganisms. Release of active ingredients can be immediate or delayed.
  • the 108 castings and a production pelleted raw control were sown in a 108 plug flat to evaluate germination. Seeds were sown at 25°C. The plug trays were run through a watering tunnel and then put into a Stage 1 mist chamber for three days. Upon radical emergence, the plugs were placed in a Stage 2 chamber for seven days. Germination results are shown in Table 8, with day 10 being the count date. Pelleted raw seed was a commercial pelleted seed with one seed per pellet. Seeds in the PVA castings were considered germinated if four or more seedlings grew from the casting. Table 8 Crop/Variety Treatment Germination % Petunia/P.T. Pelleted Raw 95 10% PVA 100 12.5% PVA 100 15% PVA 80 20% PVA 95
  • Germination results were the same or better for the 10% PVA, 12.5% PVA, and 20% PVA treatments as compared to the pelleted raw seed control.
  • the 15% PVA treatment yielded only 80% germination as compared to 95% germination for the control, but this is probably a statistical anomaly since the 12.5% PVA and 20% PVA treatments yielded 100% and 95% germination rates, respectively. Therefore, germination rates of the treated seeds were as good as germination rates for the control.
  • the 108 castings and a production pelleted control were sown in a 108 plug flat to evaluate germination. Seeds were sown at 25°C. The plug trays were run through a watering tunnel and then put into a Stage 1 mist chamber for two days. Upon radical emergence, the plugs were placed in a Stage 2 chamber for five days. Germination results are shown in Table 9, with day 7 being the count date. Seeds in the castings were considered germinated if six or more seedlings grew from the casting. Table 9 Crop/Variety Treatment Germination % Lettuce/Alfresco Production Pellet 90 43-01 100 Lettuce/City Garden Production Pellet 90 43-01 100 Lettuce/Global Gourmet Production Pellet 97 43-01 100

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Claims (16)

  1. Zusammensetzung umfassend ein Gemisch aus einem oder mehreren Pflanzensamen und einer härtbaren, fließfähigen Gießsubstanz, worin das Gemisch als ein gegossenes Pellet konfiguriert ist.
  2. Zusammensetzung nach Anspruch 1, worin die Gießsubstanz ausgewählt ist aus wasserlöslichen Thermoplasten, Gipsen, Polyacrylamiden oder Derivaten davon, Polyacrylsäuren, schmelzverarbeitbaren Stärken, harten Fetten, Wachsen, Polyvinylalkoholen, Glyceriden, partiellen Glyceriden und Gemischen davon.
  3. Zusammensetzung nach Anspruch 1 oder 2, worin das Pellet mindestens zwei Pflanzensamen umfasst.
  4. Zusammensetzung nach Anspruch 3, worin die mindestens zwei Pflanzensamen Samen einer Sorte umfassen.
  5. Zusammensetzung nach Anspruch 3, worin die mindestens zwei Pflanzensamen Samen von mindestens zwei verschiedenen Sorten derselben Spezies umfassen.
  6. Zusammensetzung nach Anspruch 3, worin die mindestens zwei Pflanzensamen Samen von mindestens zwei verschiedenen Spezies umfassen.
  7. Zusammensetzung nach Anspruch 1-6, worin die Gießsubstanz einen wasserlöslichen Thermoplast umfasst.
  8. Zusammensetzung nach Anspruch 7, worin der Thermoplast eine Glasübergangstemperatur von 35,0 °C oder höher aufweist.
  9. Zusammensetzung nach Anspruch 7 oder 8, worin der Thermoplast eine Schmelztemperatur von 65,6 °C oder niedriger aufweist.
  10. Zusammensetzung nach Anspruch 7-9, worin der Thermoplast Polyethylenglycol umfasst.
  11. Zusammensetzung nach Anspruch 1-10, worin das Gemisch ferner einen Füllstoff umfasst, der die rheologischen Eigenschaften des gegossenen Pellets modifiziert.
  12. Zusammensetzung nach Anspruch 1-11, ferner umfassend ein(en) oder mehrere Pflanzenwachstumsregulatoren, Insektizide, Fungizide, Bakterizide, Dünger, Mikroorganismen oder Gemische davon.
  13. Zusammensetzung nach Anspruch 1-12, ferner umfassend eine auf dem gegossenen Pellet aufgebrachte Überschichtung.
  14. Zusammensetzung nach Anspruch 1-13, worin der eine oder mehrere Pflanzensamen unbehandelt, beschichtet, pelletiert, behandelt, geprimt oder Gemische davon sind.
  15. Zusammensetzung nach Anspruch 1-14, ferner umfassend ein Dummy-Pellet oder eine Smart-Pille.
  16. Verfahren zur Herstellung eines gegossenen Pellets wie in einem der vorhergehenden Ansprüche dargelegt, wobei das Verfahren umfasst:
    a) Platzieren, in einer Form, eines Gemisches aus einem oder mehreren Pflanzensamen und der härtbaren, fließfähigen Gießsubstanz in einem fließfähigen Zustand; und
    b) Bewirken, das die Gießsubstanz härtet, um in dem gegossenen Pellet zu resultieren.
EP11763412.1A 2010-04-01 2011-03-31 Gegossene pellets zum pflanzen von samen Active EP2553013B1 (de)

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PCT/US2011/030666 WO2011123602A1 (en) 2010-04-01 2011-03-31 Cast pellets for planting seeds

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US11399455B1 (en) 2022-08-02
US10798869B2 (en) 2020-10-13
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EP2553013A4 (de) 2017-07-05
EP2553013A1 (de) 2013-02-06

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